/*
- *
- * readconf.c
- *
* Author: Tatu Ylonen <ylo@cs.hut.fi>
- *
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
* All rights reserved
- *
- * Created: Sat Apr 22 00:03:10 1995 ylo
- *
* Functions for reading the configuration files.
- *
+ *
+ * As far as I am concerned, the code I have written for this software
+ * can be used freely for any purpose. Any derived versions of this
+ * software must be clearly marked as such, and if the derived work is
+ * incompatible with the protocol description in the RFC file, it must be
+ * called by a name other than "ssh" or "Secure Shell".
*/
#include "includes.h"
-RCSID("$Id$");
+RCSID("$OpenBSD: readconf.c,v 1.60 2001/01/28 20:36:16 stevesk Exp $");
#include "ssh.h"
+#include "xmalloc.h"
+#include "compat.h"
#include "cipher.h"
+#include "pathnames.h"
+#include "log.h"
#include "readconf.h"
-#include "xmalloc.h"
+#include "match.h"
+#include "misc.h"
/* Format of the configuration file:
# Defaults for various options
Host *
ForwardAgent no
- ForwardX11 yes
+ ForwardX11 no
RhostsAuthentication yes
PasswordAuthentication yes
RSAAuthentication yes
oBadOption,
oForwardAgent, oForwardX11, oGatewayPorts, oRhostsAuthentication,
oPasswordAuthentication, oRSAAuthentication, oFallBackToRsh, oUseRsh,
- oSkeyAuthentication,
+ oChallengeResponseAuthentication, oXAuthLocation,
#ifdef KRB4
oKerberosAuthentication,
#endif /* KRB4 */
oUser, oHost, oEscapeChar, oRhostsRSAAuthentication, oProxyCommand,
oGlobalKnownHostsFile, oUserKnownHostsFile, oConnectionAttempts,
oBatchMode, oCheckHostIP, oStrictHostKeyChecking, oCompression,
- oCompressionLevel, oKeepAlives, oNumberOfPasswordPrompts, oTISAuthentication,
- oUsePrivilegedPort, oLogLevel
+ oCompressionLevel, oKeepAlives, oNumberOfPasswordPrompts,
+ oUsePrivilegedPort, oLogLevel, oCiphers, oProtocol,
+ oGlobalKnownHostsFile2, oUserKnownHostsFile2, oPubkeyAuthentication,
+ oKbdInteractiveAuthentication, oKbdInteractiveDevices, oHostKeyAlias
} OpCodes;
/* Textual representations of the tokens. */
} keywords[] = {
{ "forwardagent", oForwardAgent },
{ "forwardx11", oForwardX11 },
+ { "xauthlocation", oXAuthLocation },
{ "gatewayports", oGatewayPorts },
{ "useprivilegedport", oUsePrivilegedPort },
{ "rhostsauthentication", oRhostsAuthentication },
{ "passwordauthentication", oPasswordAuthentication },
+ { "kbdinteractiveauthentication", oKbdInteractiveAuthentication },
+ { "kbdinteractivedevices", oKbdInteractiveDevices },
{ "rsaauthentication", oRSAAuthentication },
- { "skeyauthentication", oSkeyAuthentication },
+ { "pubkeyauthentication", oPubkeyAuthentication },
+ { "dsaauthentication", oPubkeyAuthentication }, /* alias */
+ { "challengeresponseauthentication", oChallengeResponseAuthentication },
+ { "skeyauthentication", oChallengeResponseAuthentication }, /* alias */
+ { "tisauthentication", oChallengeResponseAuthentication }, /* alias */
#ifdef KRB4
{ "kerberosauthentication", oKerberosAuthentication },
#endif /* KRB4 */
{ "fallbacktorsh", oFallBackToRsh },
{ "usersh", oUseRsh },
{ "identityfile", oIdentityFile },
+ { "identityfile2", oIdentityFile }, /* alias */
{ "hostname", oHostName },
+ { "hostkeyalias", oHostKeyAlias },
{ "proxycommand", oProxyCommand },
{ "port", oPort },
{ "cipher", oCipher },
+ { "ciphers", oCiphers },
+ { "protocol", oProtocol },
{ "remoteforward", oRemoteForward },
{ "localforward", oLocalForward },
{ "user", oUser },
{ "rhostsrsaauthentication", oRhostsRSAAuthentication },
{ "globalknownhostsfile", oGlobalKnownHostsFile },
{ "userknownhostsfile", oUserKnownHostsFile },
+ { "globalknownhostsfile2", oGlobalKnownHostsFile2 },
+ { "userknownhostsfile2", oUserKnownHostsFile2 },
{ "connectionattempts", oConnectionAttempts },
{ "batchmode", oBatchMode },
{ "checkhostip", oCheckHostIP },
{ "compressionlevel", oCompressionLevel },
{ "keepalive", oKeepAlives },
{ "numberofpasswordprompts", oNumberOfPasswordPrompts },
- { "tisauthentication", oTISAuthentication },
{ "loglevel", oLogLevel },
{ NULL, 0 }
};
-/* Characters considered whitespace in strtok calls. */
-#define WHITESPACE " \t\r\n"
-
-
/*
* Adds a local TCP/IP port forward to options. Never returns if there is an
* error.
*/
-void
+void
add_local_forward(Options *options, u_short port, const char *host,
u_short host_port)
{
Forward *fwd;
+#ifndef HAVE_CYGWIN
extern uid_t original_real_uid;
if (port < IPPORT_RESERVED && original_real_uid != 0)
fatal("Privileged ports can only be forwarded by root.\n");
+#endif
if (options->num_local_forwards >= SSH_MAX_FORWARDS_PER_DIRECTION)
fatal("Too many local forwards (max %d).", SSH_MAX_FORWARDS_PER_DIRECTION);
fwd = &options->local_forwards[options->num_local_forwards++];
* an error.
*/
-void
+void
add_remote_forward(Options *options, u_short port, const char *host,
u_short host_port)
{
* returns if the token is not known.
*/
-static OpCodes
+static OpCodes
parse_token(const char *cp, const char *filename, int linenum)
{
- unsigned int i;
+ u_int i;
for (i = 0; keywords[i].name; i++)
if (strcasecmp(cp, keywords[i].name) == 0)
char *line, const char *filename, int linenum,
int *activep)
{
- char buf[256], *cp, *string, **charptr, *cp2;
+ char buf[256], *s, *string, **charptr, *endofnumber, *keyword, *arg;
int opcode, *intptr, value;
u_short fwd_port, fwd_host_port;
- /* Skip leading whitespace. */
- cp = line + strspn(line, WHITESPACE);
- if (!*cp || *cp == '\n' || *cp == '#')
+ s = line;
+ /* Get the keyword. (Each line is supposed to begin with a keyword). */
+ keyword = strdelim(&s);
+ /* Ignore leading whitespace. */
+ if (*keyword == '\0')
+ keyword = strdelim(&s);
+ if (keyword == NULL || !*keyword || *keyword == '\n' || *keyword == '#')
return 0;
- /* Get the keyword. (Each line is supposed to begin with a keyword). */
- cp = strtok(cp, WHITESPACE);
- opcode = parse_token(cp, filename, linenum);
+ opcode = parse_token(keyword, filename, linenum);
switch (opcode) {
case oBadOption:
case oForwardAgent:
intptr = &options->forward_agent;
parse_flag:
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
fatal("%.200s line %d: Missing yes/no argument.", filename, linenum);
value = 0; /* To avoid compiler warning... */
- if (strcmp(cp, "yes") == 0 || strcmp(cp, "true") == 0)
+ if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
value = 1;
- else if (strcmp(cp, "no") == 0 || strcmp(cp, "false") == 0)
+ else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
value = 0;
else
fatal("%.200s line %d: Bad yes/no argument.", filename, linenum);
intptr = &options->password_authentication;
goto parse_flag;
+ case oKbdInteractiveAuthentication:
+ intptr = &options->kbd_interactive_authentication;
+ goto parse_flag;
+
+ case oKbdInteractiveDevices:
+ charptr = &options->kbd_interactive_devices;
+ goto parse_string;
+
+ case oPubkeyAuthentication:
+ intptr = &options->pubkey_authentication;
+ goto parse_flag;
+
case oRSAAuthentication:
intptr = &options->rsa_authentication;
goto parse_flag;
intptr = &options->rhosts_rsa_authentication;
goto parse_flag;
- case oTISAuthentication:
- /* fallthrough, there is no difference on the client side */
- case oSkeyAuthentication:
- intptr = &options->skey_authentication;
+ case oChallengeResponseAuthentication:
+ intptr = &options->challenge_reponse_authentication;
goto parse_flag;
#ifdef KRB4
case oStrictHostKeyChecking:
intptr = &options->strict_host_key_checking;
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
- fatal("%.200s line %d: Missing yes/no argument.",
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
+ fatal("%.200s line %d: Missing yes/no/ask argument.",
filename, linenum);
value = 0; /* To avoid compiler warning... */
- if (strcmp(cp, "yes") == 0 || strcmp(cp, "true") == 0)
+ if (strcmp(arg, "yes") == 0 || strcmp(arg, "true") == 0)
value = 1;
- else if (strcmp(cp, "no") == 0 || strcmp(cp, "false") == 0)
+ else if (strcmp(arg, "no") == 0 || strcmp(arg, "false") == 0)
value = 0;
- else if (strcmp(cp, "ask") == 0)
+ else if (strcmp(arg, "ask") == 0)
value = 2;
else
fatal("%.200s line %d: Bad yes/no/ask argument.", filename, linenum);
goto parse_int;
case oIdentityFile:
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
fatal("%.200s line %d: Missing argument.", filename, linenum);
if (*activep) {
- if (options->num_identity_files >= SSH_MAX_IDENTITY_FILES)
+ intptr = &options->num_identity_files;
+ if (*intptr >= SSH_MAX_IDENTITY_FILES)
fatal("%.200s line %d: Too many identity files specified (max %d).",
filename, linenum, SSH_MAX_IDENTITY_FILES);
- options->identity_files[options->num_identity_files++] = xstrdup(cp);
+ charptr = &options->identity_files[*intptr];
+ *charptr = xstrdup(arg);
+ *intptr = *intptr + 1;
}
break;
+ case oXAuthLocation:
+ charptr=&options->xauth_location;
+ goto parse_string;
+
case oUser:
charptr = &options->user;
parse_string:
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
fatal("%.200s line %d: Missing argument.", filename, linenum);
if (*activep && *charptr == NULL)
- *charptr = xstrdup(cp);
+ *charptr = xstrdup(arg);
break;
case oGlobalKnownHostsFile:
charptr = &options->user_hostfile;
goto parse_string;
+ case oGlobalKnownHostsFile2:
+ charptr = &options->system_hostfile2;
+ goto parse_string;
+
+ case oUserKnownHostsFile2:
+ charptr = &options->user_hostfile2;
+ goto parse_string;
+
case oHostName:
charptr = &options->hostname;
goto parse_string;
+ case oHostKeyAlias:
+ charptr = &options->host_key_alias;
+ goto parse_string;
+
case oProxyCommand:
charptr = &options->proxy_command;
string = xstrdup("");
- while ((cp = strtok(NULL, WHITESPACE)) != NULL) {
- string = xrealloc(string, strlen(string) + strlen(cp) + 2);
+ while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
+ string = xrealloc(string, strlen(string) + strlen(arg) + 2);
strcat(string, " ");
- strcat(string, cp);
+ strcat(string, arg);
}
if (*activep && *charptr == NULL)
*charptr = string;
case oPort:
intptr = &options->port;
parse_int:
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
fatal("%.200s line %d: Missing argument.", filename, linenum);
- if (cp[0] < '0' || cp[0] > '9')
+ if (arg[0] < '0' || arg[0] > '9')
fatal("%.200s line %d: Bad number.", filename, linenum);
/* Octal, decimal, or hex format? */
- value = strtol(cp, &cp2, 0);
- if (cp == cp2)
+ value = strtol(arg, &endofnumber, 0);
+ if (arg == endofnumber)
fatal("%.200s line %d: Bad number.", filename, linenum);
if (*activep && *intptr == -1)
*intptr = value;
case oCipher:
intptr = &options->cipher;
- cp = strtok(NULL, WHITESPACE);
- value = cipher_number(cp);
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
+ fatal("%.200s line %d: Missing argument.", filename, linenum);
+ value = cipher_number(arg);
if (value == -1)
fatal("%.200s line %d: Bad cipher '%s'.",
- filename, linenum, cp ? cp : "<NONE>");
+ filename, linenum, arg ? arg : "<NONE>");
if (*activep && *intptr == -1)
*intptr = value;
break;
+ case oCiphers:
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
+ fatal("%.200s line %d: Missing argument.", filename, linenum);
+ if (!ciphers_valid(arg))
+ fatal("%.200s line %d: Bad SSH2 cipher spec '%s'.",
+ filename, linenum, arg ? arg : "<NONE>");
+ if (*activep && options->ciphers == NULL)
+ options->ciphers = xstrdup(arg);
+ break;
+
+ case oProtocol:
+ intptr = &options->protocol;
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
+ fatal("%.200s line %d: Missing argument.", filename, linenum);
+ value = proto_spec(arg);
+ if (value == SSH_PROTO_UNKNOWN)
+ fatal("%.200s line %d: Bad protocol spec '%s'.",
+ filename, linenum, arg ? arg : "<NONE>");
+ if (*activep && *intptr == SSH_PROTO_UNKNOWN)
+ *intptr = value;
+ break;
+
case oLogLevel:
intptr = (int *) &options->log_level;
- cp = strtok(NULL, WHITESPACE);
- value = log_level_number(cp);
+ arg = strdelim(&s);
+ value = log_level_number(arg);
if (value == (LogLevel) - 1)
fatal("%.200s line %d: unsupported log level '%s'\n",
- filename, linenum, cp ? cp : "<NONE>");
+ filename, linenum, arg ? arg : "<NONE>");
if (*activep && (LogLevel) * intptr == -1)
*intptr = (LogLevel) value;
break;
case oRemoteForward:
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
fatal("%.200s line %d: Missing argument.", filename, linenum);
- if (cp[0] < '0' || cp[0] > '9')
+ if (arg[0] < '0' || arg[0] > '9')
fatal("%.200s line %d: Badly formatted port number.",
filename, linenum);
- fwd_port = atoi(cp);
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
+ fwd_port = atoi(arg);
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
fatal("%.200s line %d: Missing second argument.",
filename, linenum);
- if (sscanf(cp, "%255[^:]:%hu", buf, &fwd_host_port) != 2)
+ if (sscanf(arg, "%255[^:]:%hu", buf, &fwd_host_port) != 2)
fatal("%.200s line %d: Badly formatted host:port.",
filename, linenum);
if (*activep)
break;
case oLocalForward:
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
fatal("%.200s line %d: Missing argument.", filename, linenum);
- if (cp[0] < '0' || cp[0] > '9')
+ if (arg[0] < '0' || arg[0] > '9')
fatal("%.200s line %d: Badly formatted port number.",
filename, linenum);
- fwd_port = atoi(cp);
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
+ fwd_port = atoi(arg);
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
fatal("%.200s line %d: Missing second argument.",
filename, linenum);
- if (sscanf(cp, "%255[^:]:%hu", buf, &fwd_host_port) != 2)
+ if (sscanf(arg, "%255[^:]:%hu", buf, &fwd_host_port) != 2)
fatal("%.200s line %d: Badly formatted host:port.",
filename, linenum);
if (*activep)
case oHost:
*activep = 0;
- while ((cp = strtok(NULL, WHITESPACE)) != NULL)
- if (match_pattern(host, cp)) {
- debug("Applying options for %.100s", cp);
+ while ((arg = strdelim(&s)) != NULL && *arg != '\0')
+ if (match_pattern(host, arg)) {
+ debug("Applying options for %.100s", arg);
*activep = 1;
break;
}
- /* Avoid garbage check below, as strtok already returned NULL. */
+ /* Avoid garbage check below, as strdelim is done. */
return 0;
case oEscapeChar:
intptr = &options->escape_char;
- cp = strtok(NULL, WHITESPACE);
- if (!cp)
+ arg = strdelim(&s);
+ if (!arg || *arg == '\0')
fatal("%.200s line %d: Missing argument.", filename, linenum);
- if (cp[0] == '^' && cp[2] == 0 &&
- (unsigned char) cp[1] >= 64 && (unsigned char) cp[1] < 128)
- value = (unsigned char) cp[1] & 31;
- else if (strlen(cp) == 1)
- value = (unsigned char) cp[0];
- else if (strcmp(cp, "none") == 0)
+ if (arg[0] == '^' && arg[2] == 0 &&
+ (u_char) arg[1] >= 64 && (u_char) arg[1] < 128)
+ value = (u_char) arg[1] & 31;
+ else if (strlen(arg) == 1)
+ value = (u_char) arg[0];
+ else if (strcmp(arg, "none") == 0)
value = -2;
else {
fatal("%.200s line %d: Bad escape character.",
}
/* Check that there is no garbage at end of line. */
- if (strtok(NULL, WHITESPACE) != NULL)
- fatal("%.200s line %d: garbage at end of line.",
- filename, linenum);
+ if ((arg = strdelim(&s)) != NULL && *arg != '\0') {
+ fatal("%.200s line %d: garbage at end of line; \"%.200s\".",
+ filename, linenum, arg);
+ }
return 0;
}
* there is an error. If the file does not exist, this returns immediately.
*/
-void
+void
read_config_file(const char *filename, const char *host, Options *options)
{
FILE *f;
* system config file. Last, fill_default_options is called.
*/
-void
+void
initialize_options(Options * options)
{
memset(options, 'X', sizeof(*options));
options->forward_agent = -1;
options->forward_x11 = -1;
+ options->xauth_location = NULL;
options->gateway_ports = -1;
options->use_privileged_port = -1;
options->rhosts_authentication = -1;
options->rsa_authentication = -1;
- options->skey_authentication = -1;
+ options->pubkey_authentication = -1;
+ options->challenge_reponse_authentication = -1;
#ifdef KRB4
options->kerberos_authentication = -1;
#endif
options->afs_token_passing = -1;
#endif
options->password_authentication = -1;
+ options->kbd_interactive_authentication = -1;
+ options->kbd_interactive_devices = NULL;
options->rhosts_rsa_authentication = -1;
options->fallback_to_rsh = -1;
options->use_rsh = -1;
options->connection_attempts = -1;
options->number_of_password_prompts = -1;
options->cipher = -1;
+ options->ciphers = NULL;
+ options->protocol = SSH_PROTO_UNKNOWN;
options->num_identity_files = 0;
options->hostname = NULL;
+ options->host_key_alias = NULL;
options->proxy_command = NULL;
options->user = NULL;
options->escape_char = -1;
options->system_hostfile = NULL;
options->user_hostfile = NULL;
+ options->system_hostfile2 = NULL;
+ options->user_hostfile2 = NULL;
options->num_local_forwards = 0;
options->num_remote_forwards = 0;
options->log_level = (LogLevel) - 1;
* options for which no value has been specified with their default values.
*/
-void
+void
fill_default_options(Options * options)
{
if (options->forward_agent == -1)
- options->forward_agent = 1;
+ options->forward_agent = 0;
if (options->forward_x11 == -1)
- options->forward_x11 = 1;
+ options->forward_x11 = 0;
+#ifdef XAUTH_PATH
+ if (options->xauth_location == NULL)
+ options->xauth_location = XAUTH_PATH;
+#endif /* XAUTH_PATH */
if (options->gateway_ports == -1)
options->gateway_ports = 0;
if (options->use_privileged_port == -1)
options->rhosts_authentication = 1;
if (options->rsa_authentication == -1)
options->rsa_authentication = 1;
- if (options->skey_authentication == -1)
- options->skey_authentication = 0;
+ if (options->pubkey_authentication == -1)
+ options->pubkey_authentication = 1;
+ if (options->challenge_reponse_authentication == -1)
+ options->challenge_reponse_authentication = 0;
#ifdef KRB4
if (options->kerberos_authentication == -1)
options->kerberos_authentication = 1;
#endif /* AFS */
if (options->password_authentication == -1)
options->password_authentication = 1;
+ if (options->kbd_interactive_authentication == -1)
+ options->kbd_interactive_authentication = 1;
if (options->rhosts_rsa_authentication == -1)
options->rhosts_rsa_authentication = 1;
if (options->fallback_to_rsh == -1)
- options->fallback_to_rsh = 1;
+ options->fallback_to_rsh = 0;
if (options->use_rsh == -1)
options->use_rsh = 0;
if (options->batch_mode == -1)
/* Selected in ssh_login(). */
if (options->cipher == -1)
options->cipher = SSH_CIPHER_NOT_SET;
+ /* options->ciphers, default set in myproposals.h */
+ if (options->protocol == SSH_PROTO_UNKNOWN)
+ options->protocol = SSH_PROTO_1|SSH_PROTO_2|SSH_PROTO_1_PREFERRED;
if (options->num_identity_files == 0) {
- options->identity_files[0] =
- xmalloc(2 + strlen(SSH_CLIENT_IDENTITY) + 1);
- sprintf(options->identity_files[0], "~/%.100s", SSH_CLIENT_IDENTITY);
- options->num_identity_files = 1;
+ if (options->protocol & SSH_PROTO_1) {
+ options->identity_files[options->num_identity_files] =
+ xmalloc(2 + strlen(_PATH_SSH_CLIENT_IDENTITY) + 1);
+ sprintf(options->identity_files[options->num_identity_files++],
+ "~/%.100s", _PATH_SSH_CLIENT_IDENTITY);
+ }
+ if (options->protocol & SSH_PROTO_2) {
+ options->identity_files[options->num_identity_files] =
+ xmalloc(2 + strlen(_PATH_SSH_CLIENT_ID_DSA) + 1);
+ sprintf(options->identity_files[options->num_identity_files++],
+ "~/%.100s", _PATH_SSH_CLIENT_ID_DSA);
+ }
}
if (options->escape_char == -1)
options->escape_char = '~';
if (options->system_hostfile == NULL)
- options->system_hostfile = SSH_SYSTEM_HOSTFILE;
+ options->system_hostfile = _PATH_SSH_SYSTEM_HOSTFILE;
if (options->user_hostfile == NULL)
- options->user_hostfile = SSH_USER_HOSTFILE;
+ options->user_hostfile = _PATH_SSH_USER_HOSTFILE;
+ if (options->system_hostfile2 == NULL)
+ options->system_hostfile2 = _PATH_SSH_SYSTEM_HOSTFILE2;
+ if (options->user_hostfile2 == NULL)
+ options->user_hostfile2 = _PATH_SSH_USER_HOSTFILE2;
if (options->log_level == (LogLevel) - 1)
options->log_level = SYSLOG_LEVEL_INFO;
/* options->proxy_command should not be set by default */
/* options->user will be set in the main program if appropriate */
/* options->hostname will be set in the main program if appropriate */
+ /* options->host_key_alias should not be set by default */
}
andersk / openssh.git / blobdiff